Material for protecting sheets, &amp;c., in tinning.



- otively smal per cent. is the maximum that need be,

UNITED STATES PATENT OFFICE.

.fJoH N' A} KYLE, or CHICAGO, ILLINOIS.

MATEI'RIAL FDRI-FROTEOT'INGSHEETS, &c., IN TINNING.

To all" 'wlmmfit mm; concern;- I Be it known that 1', Jon A. KYLE, a subject of theKing of England, residing 'at-Chie cago, in the county of Cook and State of Illi- 5' 'no1s, have invented certain new and useful Improvements in Material for Protecting Sheets, &c., in Tinning, of which the followguis a'specification. y

y invention consists in the production of .Q.:-,.-,82 new material used in the manufacture of tinland terne sheets tobe employed in cove'ring the tin or lead bath, so as to prevent oxidation of thebath and of the coated surface of'the' sheet while the metal is solidify- 15 ing, and the same is designed'as an improve ment upon or substitute for the material 8111- ployed for the same purpose as described and claimed in my prior Letters Patent of the United States, No. 679,972, dated August 6, .go 1901. y

The object of my present invention is to provide an improved material of the character described having such roperties or con stit'uencies that a pl ate may e produced which 45 ispractically free from blemish or fog, as well 'asfree from black specks; which results are important and valuab e in the tin-plate industry. A further object of my invention is to ro- ;vide a material of said character which s all retain its fluidity in continued use and shall minimize the tendenc to become blackened. have discovered t at a better product of tin plate can be produced if, instead of using simply a fatty acid or acids and a petroleum product-such as, for instance, described and claimed in my patent aforesaid-I incorporate a small proportion of a glycerid of what is known chemically as the non-drying class-that is, a glycerid which is practically riownon-oxidiz'able by air at the temperature of the'metal coating bath and. has the property of remaining fluid even when maintained in contact with the air at a relatively high temperature, which is the case with my said material, inasmuch as the temperature of the tinnin or metal-coating bath is about 600 Fah ren eit, more or less. The amount of the glycerid necessary in my improved compound or material to roduce the desired results is relai: and I now' consider that fifteen used.

The glycerid which I prefer to employ is ;castor-oil obtained by pressure or any other v.51ei means from what is known as the castor- Specification of Letters Patent. Applicatio fil d April 4,1906. Serial insoasee.

' Patented Jan. "29, 1907,

bean? butI do not wish to be understood as limiting myself to the use of this particular glycerid, so far as my broader claims are con- I cerned, inasmuch as I may employ any glyce erid, either of an animal or vegetable source,

which practically cannot be oxidized or" caused. to solidify by the action of the air at the temperature of the metal-coating bath, which in practice is600 Fahrenheit, more or less, in the case of tin, and 700 Fahrenheit, more or less, in the case of lead. In practire and referring to my preferred method of producing my said improved material or \compound I mix with said glycerid a pet-roleum'product of the same class as referred to.

in my Letters Patent aforesaid-'that is, having a fire test of 400 to 725 Fahrenheit, more or less. According to the proportions which are preferred I take aboutone part of .the glycerid to four parts of the petroleum product, although, as will be understood, these particular proportions may be varied somewhat. \Vith this mixture of the glycerid and petroleum product I now incorporate as a component part of my material and also to insure a solution of the lycerida fatty acid or fatty acids, which solidify at or above, say, 68 Fahrenheit and which are practically non-oxidizahle by the air at the temperature of the metal-coating bath. This fatty acid or fatty acids may be either of an animal or a vegetable source and may be prepared in the manner set forth in my Letters Patent aforesaid. The proportions of fatty acid or fatty acids to thesaid mixture of glycerid and petroleum product or glycerids and petroleum product should be about one part of the former to three parts of the latter; butsuch proportions may bemodified somewhat Without departing from the spirit and scope of my invention.

In practice the completed compound is now heated upand maintained for some time at the melting-point of tin, which is about 450 Fahrenheit, and the same is then cooled andfiltered to remove, any vegetable or animal fiber or other extraneous matter which may have become coagulated or separated during said heating operation. The material or compound is now ready for use in the manner now well known in the art. This filtering of the material is desirable for removing such extraneous matters whichif not removed eventually carbonize and'form objectionable black specks on the plate.

1. v A material for use in coating sheets with metal consisting of a fatty acid, a glycerid,

and a solvent for. such f atty'aeid and glycerid end being said acid and glycerid being nonw-oxidizableat the temperature of the metal-coating bath;

substantially as described. 7

2. A material for use in coating sheetswith metal consisting of a fatty acid; a petroleum prpduct, and a glycerid, said acid and glyc non oxidizable at the temperature of the metal-coating bath; substantially di'zable'at the temperature of the 'metal-coaingbath'; substantially as described.

4. A material for use in coating sheets with metal consisting of a fatty acid, castdr-oil, and a'solvent for such fatty acid and -cast01'-- '0il,- said acid being -n0n'-0xidizabl e at the temperature of the metal-coating bath; substantially'as described. 7

, -5. Ajmaterial'for useincoatin sheets with metal consistingof a fattyaci caster-oil, and apetrole'und product said acid being nonoxidizable at the temperature of the metalcoating bath'; substantially as described. Y

' I JOHN A. KYLE. Witnesses;

4 S. .E'. HIBBEIQ';

LOUIS BI Enwm; 

